Luggage attachment is a term used to describe items that are attached to luggage for identification purposes. The most common items used for this purpose are nametags, tags, and IDtags. Nametags are typically 7 letters long and are used to identify the owner of the luggage. Tags are 3 letters long and are used to identify the type of luggage. IDtags are 5 letters long and are used to provide additional information about the luggage, such as its destination.